Study of the ferromagnetic quantum phase transition in Ce3−xMgxCo9

The Ce (Formula presented.) Mg (Formula presented.) Co (Formula presented.) system evolves from a Pauli paramagnetic ground state for x = 0 to a ferromagnetic ground state for (Formula presented.) in single-phase, polycrystalline samples [Lamichhane, V. Taufour, A. Palasyuk, Q. Lin, S.L. Budko, and P.C. Canfield, (Formula presented.) : transformation of a Pauli paramagnet into a strong permanent magnet, Phys. Rev. Appl. 9 (2018), p. 024023]. In order to better understand this behaviour, single-crystalline samples of Ce (Formula presented.) Mg (Formula presented.) Co (Formula presented.) for x = 0.01, 0.16, 0.24, 0.35, 0.43 and 0.50 were grown using the flux growth technique, and electrical transport and magnetic properties were studied. The (Formula presented.) -x phase diagram we infer shows that the system has a quantum phase transition near x = 0.35, transforming to a ferromagnetic ground state

Near room temperature antiferromagnetic ordering with a potential low-dimensional magnetism in A1Mn2 B2

We present self flux growth and characterization of single crystalline AlMn2B2. It is an orthorhombic (space group Cmmm), layered material with a platelike morphology. The anisotropic bulk magnetization data, electrical transport, and 11B nuclear magnetic resonance (NMR) data revealed an antiferromagnetic (AFM) transition at 313 ± 2 K. In the magnetization data, there is also a broad local maximum significantly above the AFM transition that could be a signature of low-dimensional magnetic interactions in AlMn2B2